Attenuated Isolate Gibellulopsis nigrescens Vn-1 Enhances Resistance against Verticillium dahliae in Potato

Potatoes are among the four most important staple crops worldwide. Verticillium wilt in potatoes caused by dahliae is a devastating disease that difficult to control. To identify potential avenues for control, pathogenicity of 72 V. isolates was tested here. We also resistance virulent isolate (Vd-36) induced attenuated Gibellulopsis nigrescens Vn-1 potatoes. Induction strongest when using inoculate with spore suspension concentration 1 × 106 conidia mL?1, followed infection Vd-36 at 5 d intervals. After incubation Vd-36, reactive oxygen species (ROS) and hydrogen peroxide (H2O2) were produced accumulated potato leaves 12 h post-inoculation. The changes respective defense enzymes, except phenylalanine ammonia-lyase, consistent ROS H2O2 levels. Furthermore, content salicylic acid (SA) inoculated plants higher than biosynthesis-related genes StNPR1, StPR1b, StPR2, StPR5 activated. However, there no significant difference jasmonic ethylene (JA/ET) between treatment control groups. These results demonstrated enhanced inducing SA signalling pathway weakly activating JA/ET pathways